Nitrogen response of sweet sorghum genotypes during rainy season

Sawargaonkar, G L and Wani, S P (2016) Nitrogen response of sweet sorghum genotypes during rainy season. Current Science, 110 (09). pp. 1699-1703. ISSN 0011-3891

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Sweet sorghum (Sorghum bicolor (L.) Moench) is a smart biofuel crop, which can be grown under tropical rainfed conditions without sacrificing food and fodder security. Three sweet sorghum cultivars (viz. ICSA 52  SPV 1411, CSH 22 SS and ICSV 93046) were grown under six nitrogen levels (0, 30, 60, 90, 120, 150 kg ha–1) on Vertisols during two rainy (kharif) seasons at ICRISAT, Patancheru, India. The results from two-year trial indicated that out of three sweet sorghum cultivars evaluated, sweet sorghum hybrid CSH 22 SS produced highest green stalk (46.90 t ha–1) and ethanol yield (1940 l ha–1) compared to other cultivars. The three cultivars responded well to applied N doses up to 150 kg ha–1, however, application of N beyond 90 kg ha–1 did not result in any significant increase in grain yield and economic returns. Net economic returns of Rs 32,898 ha–1 (US$ 601.21 ha–1) were significantly higher with 90 kg N ha–1 application as compared to other levels of fertilization. It is concluded that for obtaining the highest green stalk yield, ethanol yield and thereby maximum economic returns, sweet sorghum cultivar, viz. CSH 22 SS should be fertilized with 90 kg N ha–1.

Item Type: Article
Divisions: RP-Resilient Dryland Systems
CRP: CGIAR Research Program on Dryland Systems
Uncontrolled Keywords: Economic returns, nitrogen, potential ethanol yield, sweet sorghum
Subjects: Mandate crops > Sorghum
Others > Soil Science
Depositing User: Mr Ramesh K
Date Deposited: 09 May 2016 09:19
Last Modified: 28 Dec 2016 12:09
Official URL:
Acknowledgement: We thank Drs Ashok Kumar, Ravinder Reddy and P. Srinivas Rao, Sorghum Breeding, ICRISAT for their help and providing the seeds of different cultivars for sweet sorghum trials. We also thank financial support by the NAIP–ICAR for conducting the research as a part of NAIP–ICAR–Sweet sorghum bioethanol project. This article is part of a special edition on Soil and Water Management (Volume 110, Issue - 09, May 10, 2016)
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